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Define the terms a) balanced system or symmetrical system b) phase sequence c) balanced load

Define the terms a) balanced system or symmetrical system b) phase sequence c) balanced load

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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  • Define the terms a) balanced system or symmetrical system b) phase sequence c) balanced load d) unbalanced load. e) Line voltage f) phase voltage g) Line current h) phase voltage
1:59:19 60.6 VOLTE ! 4G* 43% KB/S Assignment-III.docx DY PATIL School of Engineering & Technology UNIVERSITY PUNE, AMBI Department of Engineering Science Sub: Basic Electrical Engineering (ESC105) ASSIGNMENT-III 1) State the advantages of 3-phase A.C. system over 1-phase A.C. system 2) Define the terms a) balanced system or symmetrical system b) phase sequence c) balanced load d) unbalanced load. e) Line voltage f) phase voltage g) Line current h) phase voltage 3) State the relation between line and phase values of voltage and current for 3-phase STAR connected load .state the equation for active, reactive power consumed by 3- phase load. 4) State the relation between line and phase values of voltage and current for 3-phase DELTA connected load .state the equation for active, reactive power consumed by 3- phase load. 5) Explain two wattmeter method for balanced load. 6) The three arms a 3-phase load each comprise an inductor of resistance 252 and of inductance 0.15 H in series with a 120µF capacitor. The supply is 415V, 50HZ. Calculate the line current and total power in watts, when the three arms are connected a) in star b) in mesh 7) A delta connected balanced load across a 400 V 3-phase supply Consist of three identical impedances, each equal to (15 + j12) Find the line Current, active power and reactive power. 8) A balanced star-connected load of (8 + j6) Q per phase is connected to a balanced 3- phase 400-V supply. Find the line current, power factor, power and total volt-amperes 9) The power in a 3-phase circuit is measured by two wattmeters. If the total power is 100 kW and power factor is 0.66 leading, what will be the reading of each wattmeter? Give the connection diagram for the wattmeter circuit. For what p.f. will one of the wattmeter read zero? 10) Two wattmeters connected to measure the input to a balanced three-phase circuit indicate 2500 W and 500 W respectively. Find the power factor of the circuit (a) when both readings are positive and (b) when the latter reading is obtained after reversing the connections to the current coil of one instrument. Subject Teachers Prof. Mrs.R.A.Chaudhari Prof. S.G.Udge
Transcribed Image Text:1:59:19 60.6 VOLTE ! 4G* 43% KB/S Assignment-III.docx DY PATIL School of Engineering & Technology UNIVERSITY PUNE, AMBI Department of Engineering Science Sub: Basic Electrical Engineering (ESC105) ASSIGNMENT-III 1) State the advantages of 3-phase A.C. system over 1-phase A.C. system 2) Define the terms a) balanced system or symmetrical system b) phase sequence c) balanced load d) unbalanced load. e) Line voltage f) phase voltage g) Line current h) phase voltage 3) State the relation between line and phase values of voltage and current for 3-phase STAR connected load .state the equation for active, reactive power consumed by 3- phase load. 4) State the relation between line and phase values of voltage and current for 3-phase DELTA connected load .state the equation for active, reactive power consumed by 3- phase load. 5) Explain two wattmeter method for balanced load. 6) The three arms a 3-phase load each comprise an inductor of resistance 252 and of inductance 0.15 H in series with a 120µF capacitor. The supply is 415V, 50HZ. Calculate the line current and total power in watts, when the three arms are connected a) in star b) in mesh 7) A delta connected balanced load across a 400 V 3-phase supply Consist of three identical impedances, each equal to (15 + j12) Find the line Current, active power and reactive power. 8) A balanced star-connected load of (8 + j6) Q per phase is connected to a balanced 3- phase 400-V supply. Find the line current, power factor, power and total volt-amperes 9) The power in a 3-phase circuit is measured by two wattmeters. If the total power is 100 kW and power factor is 0.66 leading, what will be the reading of each wattmeter? Give the connection diagram for the wattmeter circuit. For what p.f. will one of the wattmeter read zero? 10) Two wattmeters connected to measure the input to a balanced three-phase circuit indicate 2500 W and 500 W respectively. Find the power factor of the circuit (a) when both readings are positive and (b) when the latter reading is obtained after reversing the connections to the current coil of one instrument. Subject Teachers Prof. Mrs.R.A.Chaudhari Prof. S.G.Udge
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